Summon: Play three units with Shift from your void and Shift them.
Entomb: Play three units with Shift from your void and Shift them.
Card sounds may differ from in-game as they get updated.
Entomb - The ability of a unit with Entomb will activate when it dies. This combines well with effects that sacrifice units as a cost.
Summon - Does something when played
Shift - When played, you may instead pay the Shift cost. Shifted units can't attack, block, or be selected until they emerge.
Emerge - After three turns, Shifted units emerge and get Unblockable that turn.